#include<iostream>
#include<string>
#include<signal.h>
#include<cstdlib>
#include<unistd.h>
#include<vector>
#include<functional>


















// using namespace std;


class signal
{
private:
    /* data */
public:
    signal(/* args */);
    ~signal();
};

signal::signal(/* args */)
{
}

signal::~signal()
{
}
